Internal Circulation Range Hood

ABSTRACT

Disclosed is an internal circulation range hood, comprising a housing, an air-suction inlet, a fan, a cold compression chamber, an air-guide outlet, and a cooling device, wherein the air-suction inlet is in communication with the cold compression chamber and the cold compression chamber is in communication with the air-guide outlet. The fan is disposed at the air-suction inlet. The housing is in a shape of hood, and is internally provided with a hollow fume suction chamber. The air-suction inlet is arranged at atop of the fume suction chamber, and the air-guide outlet is located at a lower edge of an inner wall of the fume suction chamber, an opening of the air-guide outlet obliquely or directly faces the air-suction inlet.

CROSS REFERENCE TO RELATED APPLICATION

This patent application claims the benefit and priority of ChinesePatent Application No. 202210659895.4 filed on Jun. 13, 2022, thedisclosure of which is incorporated by reference herein in its entiretyas part of the present application.

BACKGROUND Related Field

The present disclosure relates to a range hood, and in particularrelates to an indoor internal circulation range hood.

Related Art

Emissions of global greenhouse gas have become a hot topic of discussionin the society, and technological innovation around the goals of “carbonpeak” and “carbon neutrality” is an important task we confront today.For people's livelihood carbon emissions, cooking oil fume is one of themain sources. The promotion of transformation of the kitchen applianceindustry is not only conducive to the reduction of energy consumption inthe industry, but also conducive to the public to practice a low-carbonlifestyle. The low-carbon development of purification equipment for thecooking oil fume in the large kitchen appliance industry and the rangehood for home cooking has become more urgent.

In order to solve the pollution of cooking oil fume to the atmosphere ofthe society, the products of internal circulation oil fume purificationtechnology have been shown in the society. However, it is generallyadopted to add multiple purification materials or weighing modules onthe basis of the traditional range hood to absorb or filter the oil fumegas generated by cooking and then return the absorbed or filtered gasinto the room. Such technologies have the shortcomings that the existingfiltering materials are difficult to achieve a one-time thoroughpurification of the oil fume gas, and the purification effect alsodecays with time, which in turn causes the pollution of indoor space.

BRIEF SUMMARY

For the defects in the prior art, a technical problem to be solved bythe present disclosure is to provide an internal circulation range hood,which sucks the oil fume gas generated by cooking into the range hood,and meanwhile, the exhausted gas entrains the oil fume gas generated bycooking to re-enter the same channel to circulate for re-coolingtreatment.

To achieve the objective described above, the present disclosureprovides an internal circulation range hood, comprising a housing, anair-suction inlet, a fan, a cold compression chamber, an air-guideoutlet, and a cooling device. The air-suction inlet is in communicationwith the cold compression chamber, and the cold compression chamber isin communication with the air-guide outlet. The fan is disposed at theair-suction inlet. The housing is in a shape of hood, and is internallyprovided with a hollow fume suction chamber. The air-suction inlet isarranged at a top of the fume suction chamber. The air-guide outlet isarranged at a lower edge of an inner wall of the fume suction chamber,an opening of the air-guide outlet obliquely or directly faces theair-suction inlet.

The internal circulation range hood further comprises a purificationdevice. The purification device is disposed at any position in thehousing where the gas passes.

The purification device comprises a mechanical grease separation device.The mechanical grease separation device is arranged at the air-suctioninlet.

The purification device further comprises one, or any combination, of anelectrostatic oil fume purifier, a HEPA (high-efficiency particulateair) filter, an activated carbon filter material, a photocatalystfilter, and an ultraviolet lamp.

The air-guide outlet has a plurality of holes provided around the loweredge of the inner wall of the fume suction chamber and arranged in thesame orientation. Further, the air-guide outlet is provided obliquely,and the direction of gas obliquely exhausted from the air-guide outletis consistent with a rotation direction of the fan.

The cooling device comprises a water inlet valve, a condenser, a watertank, and a water outlet valve, wherein the condenser is incommunication with the water tank, the water inlet valve is incommunication with the condenser or the water tank, the water outletvalve is in communication with the water tank, and the condenser isdisposed inside the cold compression chamber.

The internal circulation range hood further comprises a thermalinsulation layer. The thermal insulation layer is provided around thefume suction chamber.

In accordance with the internal circulation range hood provided by thepresent disclosure, under the suction and exhaust action of the fan, thegas passes through the cold compression chamber, such that the cooledgas may be ejected through the air-guide outlet, and then the ejectedcooled gas entrains the oil fume gas generated by cooking to enter thesame channel for re-cooling treatment, and so on. Thus, the oil fume gasgenerated by cooking is sucked into the internal circulation range hoodwithout being spilled into an indoor space, and the zero emission to theoutside is achieved. Meanwhile, the influence of the high-temperatureoil fume gas to the room is reduced, the load of the fan is lightened,and the energy consumption is reduced.

The conception, specific structure and resulting technical effects ofthe present disclosure will be further described below with reference tothe accompanying drawings in order to fully understand the purpose,features and effects of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a partial sectional view of an internal circulation range hoodin accordance with the present disclosure.

FIG. 2 is an enlarged view of position A in FIG. 1 .

FIG. 3 is a schematic diagram of an internal circulation range hood inaccordance with the present disclosure.

FIG. 4 is a partial sectional view of a lower portion of an internalcirculation range hood.

FIG. 5 is a side sectional view of an internal circulation range hood inaccordance with the present disclosure.

DETAILED DESCRIPTION OF VARIOUS EMBODIMENTS

The present disclosure is further described below with reference to theaccompanying drawings.

As shown in FIG. 1 to FIG. 3 , an internal circulation range hoodcomprises a housing 1, an air-suction inlet 2, a fan 3, a coldcompression chamber 4, an air-guide outlet 5, and a cooling device 6.The air-suction inlet 2 is in communication with the cold compressionchamber 4, and the cold compression chamber 4 is in communication withthe air-guide outlet 5, that is, one end of the cold compression chamber4 is in communication with the air-suction inlet 2, and the other end ofthe cold compression chamber is in communication with the air-guideoutlet 5. The fan 3 is disposed at the air-suction inlet 2, and has acertain purification effect to the oil fume gas due to its centrifugalaction.

The housing 1 is installed above a stove in a shape of hood, and isinternally provided with a hollow fume suction chamber 11. Theair-suction inlet 2 is arranged at a top of the fume suction chamber 11,and the air-guide outlet 5 is arranged at a lower edge of an inner wallof the fume suction chamber 11, an opening of the air-guide outlet 5obliquely or directly faces the air-suction inlet.

As shown in FIG. 4 , the air-guide outlet 5 has a plurality of holesprovided around the lower edge of the inner wall of the fume suctionchamber 11 and arranged in the same orientation, so as to ensure thatthe purified gas exhausted from the air-guide outlet 5 has aco-orientation property without generating mutual airflow disturbance.Further, the air-guide outlet 5 is provided obliquely, and the directionof the purified gas obliquely exhausted from the air-guide outlet 5 isconsistent with a rotation direction of the fan 3, that is, the purifiedgas exhausted from the air-guide outlet 5 does not directly face theair-suction inlet, but obliquely faces the air-suction inlet. Therefore,the purified gas exhausted from the air-guide outlet 5 form a cyclonicflow, which may improve the entrainment effect and reduce the electricalpower load of the fan 3.

As shown in FIG. 5 , the cooling device 6 comprises a water inlet valve61, a condenser, 62, a water tank 63, and a water outlet valve 64. Thecondenser 62 is in communication with the water tank 63, the water inletvalve 61 is in communication with the condenser 62 or the water tank 63,the water outlet valve 64 is in communication with the water tank 63,and the condenser 62 is disposed inside the cold compression chamber 4,so as to form a water-cooling system. Water for cooling enters thewater-cooling system from the water inlet valve 61, cold water in thecondenser 62, after absorbing the heat of gas in the cold compressionchamber 4, becomes hot water and then flows into the water tank 63, andthen a user can obtain the hot water in the water tank 63 through thewater outlet valve 64. On the one hand, the cooling device 6 enables thegas in the cold compression chamber 4 to form a temperature differencewith respect to the gas in the fume suction chamber 11 to facilitate thecirculation flow of the gas, and on the other hand, the cooling deviceenables the heated housing 1 to be cooled, which protects electricelements in the housing 1, and fully recovers the waste heat generatedduring the cooking for the user to reuse. It is worth reminding that thecooling device 6 may also employ a scheme of using cooling liquid(agent) or cold air as a carrier for heat transfer, heat storage andtemperature reduction.

The internal circulation range hold further comprises a purificationdevice 7. The purification device 7 is disposed at any position in thehousing 1 when the gas passes, such as at the air-guide outlet 2, in thecold compression chamber 4, or at the air-guide outlet 5, thusperforming further purification treatment on the oil fume gas.

The purification device 7 comprises a mechanical grease separationdevice. The mechanical grease separation device is arranged at theair-suction inlet 2 to prevent the grease from polluting components inthe housing 1.

The purification device 7 further comprises one, or any combination, ofan electrostatic oil fume purifier, a HEMA filter, an activated carbonfilter material, a photocatalyst filter, and an ultraviolet lamp (UVlamp) or the like. It is worth reminding that when the purificationdevice 7 comprises a plurality of purification components and modules,the different purification components or modules may be providedseparately, i.c., at different positions where the gas in the housing 1passes.

The internal circulation range hood further comprises a thermalinsulation layer 8. The thermal insulation layer 8 is provided aroundthe fume suction chamber 11, and may be provided inside the fume suctionchamber 11 (i.e., the inner wall of the fume suction chamber 11), or maybe provided outside the fume suction chamber 11 (i.e., the outer wall ofthe fume suction chamber 11), so as to preventing the heat inside thefume suction chamber 11 from being transferred to the inside of the coldcompression chamber 4. Therefore, a certain temperature differencebetween the cold compression cavity 4 and the fume suction chamber 11 isguaranteed to improve the efficacy, and the electric elements inside thehousing 1 are further protected.

During the operation of the internal circulation range hood, the oilfume gas generated by cooking is sucked into the cold compressionchamber 4 via the air-suction inlet 2 by suction generated by the fan 3,cooled by the cooling device 6, and then compressed and exhausted to theair-guide outlet 5, such that cooled and purified gas with a certainvelocity can be ejected to form entrainment to oil fume gas inside thefume suction chamber 11, and with the addition of the viscous effect ofthe oil fume gas itself and the suction of the fan 3, the cooled andpurified gas entrains the oil fume gas to re-enter the housing 1 forre-cooling and purification treatment, and so on. In other words, byusing the combined action of the action of the fan, the exchangemobility of cold and hot gas and the entrainment and siphon effect ofthe gas, the internal circulation adsorption and purification functionfor the oil fume gas produced by cooking is achieved.

The preferred embodiments of the present disclosure have been describedin detail above. It should be understood that those of ordinary skill inthe art may make various modifications and changes according to the ideaof the present disclosure without creative labor. Therefore, anytechnical solution that can be obtained by logical analysis, reasoningor limited experiments based on the prior art by those skilled in theart in accordance with the idea of the present disclosure shall fallwithin the scope determined by the claims.

What is claimed is:
 1. An internal circulation range hood comprising: ahousing, an air-suction inlet, a fan, a cold compression chamber, anair-guide outlet, and a cooling device, wherein: the air-suction inletis in communication with the cold compression chamber, and the coldcompression chamber is in communication with the air-guide outlet; thefan is disposed at the air-suction inlet; the housing is in a shape ofhood, and is internally provided with a hollow fume suction chamber; theair-suction inlet is arranged at the top of the fume suction chamber;and the air-guide outlet is arranged at a lower edge of an inner wall ofthe fume suction chamber, such that an opening of the air-guide outletobliquely or directly faces the air-suction inlet.
 2. The internalcirculation range hood according to claim 1, further comprising apurification device, wherein the purification device is disposed at anyposition in the housing where gas passes.
 3. The internal circulationrange hood according to claim 2, wherein the purification devicecomprises a mechanical grease separation device, the mechanical greaseseparation device being arranged at the air-suction inlet.
 4. Theinternal circulation range hood according to claim 3, wherein thepurification device further comprises one, or any combination, of anelectrostatic oil fume purifier, a HEPA filter, an activated carbonfilter material, a photocatalyst filter, and an ultraviolet lamp.
 5. Theinternal circulation range hood according to claim 1, wherein theair-guide outlet has a plurality of holes provided around the lower edgeof the inner wall of the fume suction chamber and arranged in the sameorientation.
 6. The internal circulation range hood according to claim5, wherein the air-guide outlet is provided obliquely, and the directionof gas obliquely exhausted from the air-guide outlet is consistent witha rotation direction of the fan.
 7. The internal circulation range hoodaccording to claim 1, wherein: the cooling device comprises a waterinlet valve, a condenser, a water tank, and a water outlet valve, andthe condenser is in communication with the water tank, the water inletvalve is in communication with the condenser or the water tank, thewater outlet valve is in communication with the water tank, and thecondenser is disposed inside the cold compression chamber.
 8. Theinternal circulation range hood according to claim 1, further comprisinga thermal insulation layer, the thermal insulation layer being providedaround the fume suction chamber.